tn/DNSKEY: No response was received from the server over UDP (tried 11 times). See RFC 1035, Sec. 4.2. (2c0f:fab0:ffff:4:41:228:62:63, UDP_-_EDNS0_4096_D_N)
tn/DNSKEY has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (4)
tn/NS: No response was received from the server over UDP (tried 7 times) until the NSID EDNS option was removed (however, this server appeared to respond legitimately to other queries with the NSID EDNS option present). See RFC 6891, Sec. 6.1.2. (2c0f:fab0:ffff:4:41:228:62:63, UDP_-_EDNS0_4096_D_KN)
tn/SOA: No response was received until the UDP payload size was decreased, indicating that the server might be attempting to send a payload that exceeds the path maximum transmission unit (PMTU) size. See RFC 6891, Sec. 6.2.6. (2c0f:fab0:ffff:4:41:228:62:63, UDP_-_EDNS0_4096_D_KN_0x20)
tn/NSEC3PARAM has warnings; select the "Denial of existence" DNSSEC option to see them.
sl6tn3c2ud.tn/A has warnings; select the "Denial of existence" DNSSEC option to see them.